Motor driving mechanism.



N. POWER.

MOTOR DRIVING MECHANISM.

APPLICATION FILED JULY 14,1914.

Patented Oct. 16, 1917.

- 5 vwa wfo c Gamma/1 ninth e15 Ami? NICHOLAS rowan, or BROOKLYN,NEWYORK, assrenon '10 nicHoLAs POWER ooM- onion w PANYQOF NEWlYORK, N.Y,., A CORPORATION OF DELAWARE.

Moron DRIVING MECHANISM.

citizenof the United States, residing in Brooklyn, county of Ki11gs,-andState of New York, (whose post-.ofiice address is #388 Jefl'ersonavenue,) have invented new and useful Improvements in Motor Drlvlng 3Mechanism, of which the following s a l cification j 1 This inventionrelates to motor driving 'mechanism of a character especially adapted Ifor operating moving picture projecting machines; The object of theinvention is to provide a motor drive of this character which will befree from vibration and in which the speed of the driven-shaft may bevaried'as desiredwithperfectsmoothness, so

asnot to, injure the fragile film.

- A further object of the invention is to provide a motor drive of thischaracter in which the driving tensionmay be accurately regulated tofurnish sufficient power to drive the mechanism but will slip underabnormal tached to the base of straln so as not to mutilate'the Q Withthe above objects in vlewmy lnvenvtion consists of'thecconstructionshown in the "accompanying drawings and hereinafter described, and in,said drawings-- Figure l is aside elevation of my. improved motor-driveshowing thesame atthemoving picture machine;

Fig.2 is aplanview partlyin sectionvof the friction gear employed in thedrive. a v

Referring to the drawings, 1 represents a portion of the frame whichsupports on its upper part, not shown, the projecting mechanism.Suspended from the frame 1 between the legs 2 thereof is a hanger 3 towhich is rigidly attached at one end the electric motor 4: forfurnishing the driving power. Attached to the other end of the hanger 3is a bracket 5 having a bearing 6 on its lower edge in which issupportedthe free end of the motor shaft 7. Parallel with the motorshaft and slightly above and to one side of the shaft are two parallelrods or "tracks 8 fixedly supported in the bracket 5, and slidinglymounted on the rods 8 is a carriage 9 having on its under side a long Ijournal bearing 10 at right angles to the a shaft 7 The driven shaft 11of the friction gear is rotatably mounted in the bearing 10 and carrieson its free end a friction disk 12 which is driven from a friction wheel13 fast Specification of Letters Patent.

by which the carriage Patented Oct. 16, 1917.

Application filed July 14, 1914. Serial No. 850,872.

to the driven shaft and adapted to engage with its periphery the lateralface of the disk 12. 1

The position ofthe wheel 13 on the shaft 7 is such that when thecarriage 9 is ad justed to its extreme position in one direction, theperiphery of the wheel 13 will lie vbeyond the edgeof the disk 1.2 andthe driving connection between the parts will be broken. Then thecarriage is adjusted in the opposite direction the face of the disk 12at'its outer surface will first engage the wheel 13,thereby starting thedriven shaft at its lowest speed. The continued adjustment of thecarriage 9"'toward its extreme position at the opposite end of thetracks 8 will gradually increase the speed of the driven shaft to thedesired maximum speed.

For shifting the carriage 9 I provide a lever 'mechanism' consisting of'a bell-crank lever 14 pivoted uponthe bracket 5 and conmated by a link15 with anupwardly projecting ear on. the carriage 9/ The other arm ofthe bell-crank 14'. is connected by a suitable link tothe hand lever 16pivoted on the frame 1' and having'a grip latch 17 coacting with theratchet quadrant 18 to lock the lever in any desired position ofadjustment. 7

In order that the carriage'9 may have the desired resistance tomovement, so that the carriage will not be adjusted too rapidly, orbeyond the desired position,cthe hangers 19 is suspended from one of therods 8 are split and provided with ears for receiving suitable clampingbolts 20, whereby the hangers may be clamped in any desired degree offriction on the rods 8. The link 15 may conveniently be pivoted on oneof the bolts 20 as shown.

For adjusting the pressure of the disk 12 against the wheel 13 to varythe degree of o I a o 7 working in a circumferential slot on the shaft,of suflicient width to permit the desired range of adjustment and at thesame time prevent the disk moving beyond the position where its bevelededge will ride up on the periphery of the wheel 13 For driving theprojecting mechanism the shaft 11 is provided With a driving pulley 24:for receivingjthe driving belt of the proj ecting machine.

The operation of the device will be obvious from the above descriptionand need" not be further described. The gear has been 7 the difierencein the line of movement of the,

faces is slight, and hence Where there is practicall no 'rlndin such asoroduces a 'jerkydrive and vibration When the load is startedwithithevvheel too close to the center ,ofrotation ofthedisk, WVhentheconstruction is T6VlfS6d h8' engaging; faces must be brought together ata short radius of the disk to prevent an abrupt start.

Another advantage over the friction gear of the type in which the diskis thegdriving instead of the driven member is that the parts may beentirely separated when the machine is not. in operation. v

. Having thus described my invention, what I claim and desire to secureby Letters Pat.- ent is: 7

,1. Ina motor driving mechanism, the com bination of a driving shaft, afriction wheel mounted thereon, a driven shaft at right anglesto thedriving shaft, a friction disk thereon and means for shifting'the drivenshaft bodily in a direction parallel with the driving shaftto bring thewheel and' disk into and out of engagement.

j 2. In a motor driving mechanism, the combination of a driving shaft, afriction wheel mounted thereon, a driven shaft at right angles to thedriving shaft, a friction disk thereon, means for shifting thedrivenshaft Copies of this patent maybe obtained for bodily in adirectionparallel with the driving shaft to bring the Wheel and diskinto and out of engagement, and "means for ad justing the driven sha ftlongitudinally of its length for varying the driving pressurebetween'the Wheel and disk.

3. In a motor driving mechanism, the combination of a suspension hanger,a driving motor depending therefrom, a pair of guide tracks carried bysaid hanger parallel with the shaft of said driving motor, a carriageslidingly mounted on said tracks and having afjournalbearing at rightangles to said motor shaft, driven shaft in said journal bearing, and afriction wheel and friction disk mounted on said motor shaft and saiddriven shaft respectively, the range of movement of the, driving shaftbeing sufficient to permit adjustment of the wheel beyond the peripheryof the disk to disconnectthe-memhers: V V v 4;. In a motor drivingmechanism, the com* bination of a suspension hanger, a driving motordependingtherefrom, a pair of guide .tracks'carried by said'hangerparallel with the shaft of, said driving motor, acarriage slidinglymounted on said tracks and having a journal bearing at right angles tosaid motor shaft, a bearing, a friction wheel and friction disk mountedon said motor shaft and said driven shaft respectively, means foradjusting said carriage along said'tracks, and means for opposing a-variable frictional resistance to the adjustment of said carriage. Y

Signed at New York in the county of New York and State 0f New York this29th day of June, 1914 a j f a NICHOLAS POl/VER.

Witnesses: v a v W. B. MORTON, EDWARD EARL.

five cents each, by addressing the Commissioner of Patents,

Washington, D. G.

driven: shaft in said journal

